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2,452 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

United is clearly ahead here: 85% of its flights arrive on time, 17 points better than Southwest.

Best time to leave 1–2 pm 88% arrive on time from DEN
Best single flight UA 5311 DEN 13:40 → TUL 16:29 · 90% on time Avoid UA 1937 DEN 17:37 → TUL 20:27 · 80% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

9
10
11
12
13
14
15
16
17
18
19
20
DEN
92
84
71
87
78
63
75
68
38
74
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Tulsa flights leaving DEN 4–5 pm: 1Close ×
WN 4635 DEN 16:05 TUL 18:45 1h 35m 58 53% 0.0% 71 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
United (incl. SkyWest) 1,516 85% 0.7% 70 min
Southwest 893 68% 1.2% 56 min
Frontier 43 – 0.0% 73 min

Dimmed: fewer than 150 flights in the year, too few to rank.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
UA 5311flown by SkyWest DEN 13:40 TUL 16:29 90%
UA 5315flown by SkyWest DEN 10:04 TUL 12:59 88%
UA 4712flown by SkyWest DEN 20:55 TUL 23:47 81%
UA 1937 DEN 17:37 TUL 20:27 80%
All 9 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
United DEN TUL 1h 49m 85% 0.7% 1,516 Flying now
Southwest DEN TUL 1h 35m 68% 1.2% 893 Flying now
Frontier DEN TUL 1h 35m 77% 0.0% 43 Not flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON